Clamping-machine.



E. J. BELL.

GLAMPING MACHINE.

APPLICATION FILED FEB.24, 1914.

Patented Dec. 29, 1914.

2 SHEETS-SHEET 1.

RrranNEY.

Wvrwessas THE NORRIS PETERS c0, PHom-LITHQ, WASHINGTON. D, c.

E. J. BELL.

GLAMPING MACHINE.

APPLICATION FILED 11113.24, 1914.

1, 1 22,570. Patented Dec. 29, 1914.

2 SHEETS-SHEET 2.

WITNESSES NVENT'OR W Z M B HTToRNE THE NORRIS PETERS CO, FHOTO-LITHQ,WASHINGTON, D.

EDWIN J. BELL, OF OSHKOSI-I, WISCONSIN.

cLAMrING-MAenINE.

Specification of Letters Patent.

Patented Dec. 2a, was.

Application filed February 24, 1914. Serial No. 820,499.

To all whom it may concern:

Be itknown that I, EDWIN J. BELL, citizen of the United States, residingat Oshkosh, in the county of Winnebago and State of Visconsin, haveinvented certain new and useful Improvements in Clamping-Machines, ofwhich the following isa specification.

The invention relates to a new and useful clamp and has for the objectthe provisions of convenient mechanism for clamping and squeezing gluedwork, principally, doors of the dowel or tenoned type. A further obj ectbeing to economically construct the device so it will stop automaticallyand'be capable of rapid adjustment in the point of stopping. A furtherobject being the carrying out of means whereby the device'can be tiltedfrom the horizontal to an incline position and securely held in thedesired po sition. I I

In the drawings Figure 1 is a plan view of the clamp; Fig. 2 an endview; Fig. 3 a detail of the driving clutch pulleys; Fig. 4 a detail ofthe knock off adjustment; Fig.5 an end view of same and Fig. 6 a detailshowing the clamp screw drive.

Two heavy pedestal frames '1 and 2 are formed of cast iron substantiallyribbed and having a large foot or base supporting surface, the upperpart of the supports have a halfbearing 3 formed therewith in which aheavy, thick Walled pipe 4 is fitted to rock or partially rotatetherein. Within the pipe, a driving shaft 5 is mounted and journaled inbushings or bearings 7 which are fitted securely within the pipe. shaft5 extends out at one end to receive the driving pulleys 8 and 9. Thepulleys are engageable to the shaft through friction clutches which areactuated by a flanged collar 10 slidable on the shaft between thepulleys. An outboard bearing may beattached to steady the end of theshaft at 11 if desired. The shaft is also steadied by a center bearing12, held within the pipe by adjusting screws 13. t

Secured to the shaft 5 near each end bearing is a worm 14, one beingright hand and one left hand to compensate for end thrust. Openings 15are formed in the pipe above the worms to permit a worm wheel 24 to passtherethrough. A large heavy clamping frame is mounted rigidly on thepipe and is The composed of a pair of ribbed castings 16 having slideways 17 planed the entire length, the castings have double ribs leavingan open box like construction as shown. The two castings 16 are rigidlybraced and held together by two spacing beams 18 bolted therebetween. I

' A pair of clamping rails 19 and 20 are fitted to slide laterally alongthe slide ways 17 and have heavy-braced flanges 21 formed therewith. Forsliding the clamprails a pair ofdouble endright and left screws 22.

are fitted centrally with a wormfgear 24 which in turn is meshed withthe worm 14, and extend'between the ribs of the castings 16. Nuts 23 arefitted to the clamp rails at foufrl points as shown into which thescrews 22 t. i

It will be seen that by revolving the screws 22 the clamp rails 19 and20 will be drawn together or apart accordingto the direction of rotationof the screws. Bearings 25 are provided to support the shaft 22 closeto'th'e gear. A channel iron 26 is fitted to cover the upward extendinggears and to form a rest the same height as the surfaces of the clamprails 20 and has an adjustable endguide 27 for butting the work againstwhenoperating the machine. Two

guides 28 and 29 are further provided and pedal 30 the inner clutch 8 isengaged which will drive the screws in one direction to close "theclamps. An automatic stop is provided and consists of a bell crank lever36 fulcrumed to a bracket 37 extending from the support, and has one endengaging a groove in the sliding collar 10 and the other end fitted witha fork. A screw 39 is fitted to' a bearing 40 having thrust collars eachside and being secured to the clamp rail as shown. The screw 39 has acrank 42 attached theretofor adjusting the point of stopping and isthreaded nearly its entire length, passing through the fork of the lever86. Two hand wheels 43 and 44 are fitted to screw on the screw 39 whichcan be set at any point to strike the lever as the rail 20 travels inorder to stop its travel when a predetermined pressure is given to thework, and to throw out from the other clutch when the rails are wideopen. To prevent the hand wheels from turning a flat spring 45 is fittedto the forked lever 36 and adapted to spring into slots 46 previouslyformed in the hand wheels.

A spring 50 is connected to the lower arm of the lever 34 and to anextending portion of the floor bearing 51 to change engagement fromclutch 8 to 9 automatically but not of suflicient strength to disengageclutch 8 without assistance from the hand wheel 44 which strikes thelever 36 during the inward travel of the clamps.

The whole frame can be used in a horizontal position or at any angle upto near vertical, the dotted lines Fig. 2 shows the upright or nearvertical position. For turning the frame a worm 47 and gear 48 areprovided with hand wheel 49, the gear 48 being rigidly secured to theend of the pipe 4, with this gear the frame can be easily turned to anydesired working position and it will be self locking by virtue of theworm and gear, however a separate locking means can be provided ifdesired.

In operationthe machine is used in either vertical or horizontalposition, the vertical being the most convenient for one man operationon the smaller work while the horizontal is found best where two menhandle larger work from both sides. The door, previously glued, isrested on the clamp rails 19 and 20, against the edges 21 and againstthe gages 27, 28 and 29 and the foot pedal 30 pressed, this engages theclutch 8 which is driven in the proper direction to draw the clamptogether, and the work is squeezed together until the clutch is trippedby the hand wheel 44 contacting with the lever 36 which throws thecollar 10 to release the clutch, which is immediately drawn over andinto engagement with clutch 9 by means of the spring 50, the clutch 9being revolved in the opposite direction to that of clutch 8. Uponengagement of clutch 9 the clamps are drawn apart until the hand wheel43 strikes the lever 36 when the clutch 9 is released stopping themachine. For variable widths of work when the automatic stop is toeffect stopping at a different point, the crank 42 is given a turn or soin the direction desired, when it will draw both hand wheels one way orthe other to give earlier or later relative stopping. The hand wheelscan be adjusted separately by lifting the spring 45 and turning them oneway or the other and again allowing the spring to drop in the notch. Thetilting of the frame is accomplished by the hand wheel 49 through wormand gear as described.

I claim:

1. A door clamp including a supporting frame, a clamping frame mountedoscillatory thereon and having a driving shaft positioned in aXis ofoscillation, clamping jaws slidable on ways on the clamping frame andmeans operative from the driving shaft for sliding the clamp jaws on theways and means for rigidly holding the clamping frame in the desiredposition.

. 2. A door clamp including a frame, clamping jaws slidable thereon,means for swinging and locking the frame at any point from thehorizontal to near vertical position, means for positively sliding theclamping jaws comprising a driving shaft journaled axially with theswinging point of the frame and screw devices cooperative between thedriving shaft and clamping jaws.

3. A door clamp comprising a frame having slidable clamping jaws fittedthereon and actuated by right and left screws, said screws being geardriven at their central portions by means of a driving shaft journaledperpendicularly to the screws and means for tilting the frame bodilyabout the driving shaft from horizontal to near vertical position.

4; Ina door clamp the combination with supports of a frame trunnioned inthe sup ports and capable of being positioned at any point from thehorizontal to near vertical position, clamping jaws slidable on theframe, a driving shaft journaled axially with the trunnions, screwdevices cooperative with the driving shaft to slide the jaws independentof the position of the frame. I i

5. In a door clamp the combination with supporting stands, a tubejournaled in the stands, a frame secured to the tube and ca- 116 pableof limited oscillating movement therewith,clamping jaws mountedslidingly on the frame, a revoluble shaft journaled within the tube andmeans cooperative therewith forsliding the jaws.

6. In a door clamp the combination with supporting stands, a tubejournaled in the stands, a frame secured to the tube and capable oflimited oscillating movement therewith, clamping jaws mounted to slideon 120 the frame and having threaded nuts attached thereto, screwsfitted to the threaded nuts and passing perpendicularly adjacent to thetube and having gears secured thereon, a driving shaft journaled withinthe tube and having gears secured thereon and adapted to mesh with thegears on the screws, means for rotating the driving shaft and means forcontrolling the direction of rotation thereof.

7. In a door clamp the combination with supporting stands, a tubejournaled therein and carrying a frame, the frame being capable ofmaintaining a position at any point from the horizontal to near verticalby swinging with the tube, a driving shaft j ournaled within the tubeand having clutch devices attached thereto for rotating same in eitherdirection, clamping jaws slidable on the frame and means cooperativewith the driving shaft for sliding same, adjustable devices cooperativewith the jaws to start or stop the driving shaft.

8. In a door clamp the combination with supporting means having a tubejournaled therein, a frame secured to the tube and capable of rotarymovement with the tube, clamps mounted to slide on the frame and havingthreaded members secured thereto, screws fitted to the threaded membersand having a gear secured substantially at their center, a revolubleshaft journaled axially in the tube and having gears secured thereon andadapted to mesh with the gears on the screws, friction clutches mountedon the revoluble shaft and being rotatable in 0pposite directions,adjustable means cooperating between the clamps and the frictionclutches and a foot lever communicating with one of the clutches.

9. In a door clamp the combination with supporting means having anoscillatable tube journaled therein, frame members secured to the tubeand having clamping devices slidable thereon, a worm gear secured to thetube, a worm meshing therewith and journaled to the supporting means andhaving an extending operating crank.

In testimony whereof I aflix my signature, in the presence of twowitnesses.

EDWIN J.-BELL. Witnesses:

L. J. MONAHAN, F. V. MCMANAMY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

